I developed this Celtic knot cable stitch as part of a cardigan sweater that I've finally completed, and am very pleased with the results. The cable is centered up the back of the garment and the length of each sleeve. It borders either side of the front opening, mirror image. If I ever add pockets, I will include the cable, centered on the pockets. I've written a pattern of the knot only, as both a chart and also row-by-row textual instructions. I've not written a pattern for the cardigan. Contact me if such a pattern interests you. If there seems to be enough interest, I'll write one. It won't be free, though.